Means for securing turbine-blades.



EMDEN & W. FRITZ. MEANS Foa SBCURING TURBINB BLADES.

APPLICATION FILED SEPT. 7, 1909.

Paanted May l?, EMU.

iwi

UNTED i; i; i.

PAUL EMDEN AND 'WALTER FRITZ, OF

LIN, GERMAN?.

MEANS E'fr'ii` SECURING TURBINE-BLBE Specification of Letters aent.

` Application filed September 7, 1909. Serial No. 5M',5Ji.

To (ill ywfwm fit may con/cem:

B0 itlmiiwii hat we, PAUL Eimicri, a citi.

zen of ihe Swiss Rcpubiic, and iViL'rii Fici'rz, a siibieci; :if die Gennari ihiipuror, both i'vsidiis, (if Effi-iin, Geriiiiiiiyiia' have joiiiii'y invented cvrtziiii new mid iiseiii ,ii-iiiproi'eiiiciii'fi iii Means for Securing iiiirhiiie- Bhides, of? which tim foihiwing is ai specifica.- iiiii.

The Securing 0i. iiiriiiiic blades.` whether they forni pauof ihe roiiiiy iiicnibr or of die Shiiioiiairy iiiiiiiihi' is iouiicrziiiy accomplished hy fitting; the binde. midi; either iiii'cciiy 0r h5' iiiiviiiifs iii iid'crposcd Spacing iiiiliiibiiis iii luider- 5111: gioiivrs if i'hii C; i ir of ihr. i'iiior. 'iiii'hiiirl hizides :irc .surivd iiihur hy iiiii'iidliriiig ihiiii through ai ii'idciiid piiiiimi of the groove or iiii'iiiiigh zi. hiiurni uid :md iiicii SiidiiiAV hciii ieiigi'iiii'ic to (he desired it-Owiiiiiii. or simio cziwis the hhidcas :imi isliiiciii iiioiiihfgz's :iii: iiiiridlzcvi'i iiiii (hay groove ai. i righi'v iiiigic i0 iis hfiigiii zit (he desired piiiii ziiid this spacing iiioiiihws nrc iiiirsscd by dciiiiiiiziiiiiii iiilci ih@ iii ii-eraiiy iiito *die underciiii parts of til@ groove.

Reference :is i@ be had. ari the zioriipiigiy? mg drawings in whiciiw Y giirizs l, 2 r die mi@ sur iiii/eriiiou, Fig. ih-e iii. .Buried mi@ iii@ grofi've :um Fig.

ih@ siiiiie ifiigis after expansion. Wi 9 is :i cross Ssczimi oil di@ ,iii'ie 5?;-2 iii G5 i. Figs. ai sind 5 show a second form our in iei'iioii mid coi-respond i0 Figs, i. and 3. ifi i3 is ii. view siiiiiizi: ici' Fig. showing. the :iddiiiiiii of a cei'iiirni groove for ich@ nur p05@ (if i'iii-iliiziiiiig iii@ rumor/zii 0 rire ini-irn 70 iiiid S wim i Cfiriesnoiid ziiid 3 r'cyrcsiii Sini anni. f-z iiii'viiiriih lcroidiiig i0 Figs. has :i hridy a .siiiizibiy siriani und zi foot Or Miami f j widiii of which docs not ulifgf-i muri-Qwest portion of the. ri` i provided iii he si'iitioiiiiij/ rot-ry ber iu which iie binde is i0 iii if'cfcrzibiy ihr: hiioriii :edges (Z of iiiii iiig poriiiiii :irri bi. 'riad or iihiirf) shown in YFig. l. The bifide iiaiiii n besar iiiiijridiiced im@ iii@ groove c? ii iii@ desired. point :is shown iii Fig. prcxsiire 80 iii :my siiiizdi iiixiT`^ or, if? is iiziiiiiiirfr or i Y' zufhiiig Minded h ci 'mii ii Simp@ shoiifii oi'igiiiiiiiy concurre iiizier aching poriun f5 has; bemin'.

grooifz.

v im" of die-miler @iii o i. iii shows siicii iz Siriiciirii i :from iiig. ihcsiiirie ri'iiiuiiire LJ 'iii order 'ro iaiuiiiiiiic iii@ rniiiiivail @i ii'ii or hrokiiii ifiiiries. paii'i'iciihirihi/ .i zi it is desired iii rimuove sci/@rai :idjiiceniiiide? i; iiiaiy ii@ :ii'ivisiibi to provide :iii .rridiiii. iii delire-55Min g. prifciiihiy :it 'iii (feiiiiiii poi-ion 0i." 'the imiiii grfiiw iis iiic'i cidad iii .b f. Thu iiiifii'ihiiig nieiiii'ierciss mit cxciid iiiri iLhiH iuiiiiizioiizii ggrcoifei for depression which therefore remains free for the insertion of a pin, bolt or other tool, which may be inserted to facilitate the removal of the blades. While we have shown such an additional groove only in connection with the forin of our invention illustrated by Figs. 4 and 5 it will be understood that this feature may be applied 'to other forms of our invention as well.

A further expedient for facilitating the expansion of the attached portion is shown in Figs. 7 and 8. Here the bottom surface of the groove c instead of being fiat is made with two bevels sloping outwardly toward the undercut portions e so that when pressure is exerted on the attaching portion a Wedge action will occur, its edges tending to slide outwardly on the sloping surfaces h so that nally the attaching portion takes the shape shown in Fig. 8..

We claim as our invention:

l. In a turbine, the combination of a carrier having a groove, and a blade having a foot. vhich [its said groove, a secondary groove beingr provided between the trans.- verse face of the carrier and the adjacent face of said foot. l

Q, In a turbine, the combination of a carrier having a groove provided with ya depression in its transverse wall, and a blade provided with a footwhich fits said groove while leaving the depression free.

In a turbine, a carrier provided with a circumferential groove, blades provided with feet which lit said grooves, and a secondary circumferential groove between the transverse face of the carrier and the adjacent faces of said feet.

In testimony whereof We have hereunto set our hands in the presence of two subscribing witnesses.

f PAUL EMDEN.

WALTER FRITZ. Witnesses:

WOLDEMAR HAUPT, HENRY HAsPnn. 

